Audio effector circuit

Details Audio effector circuit Audio effector circuit

2003-11-07

2008-12-02

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Sound effects

C381S104000, C381S107000, C381S109000, C381S106000

Reexamination Certificate

active

07460674

ABSTRACT:
An audio effector circuit includes a first automatic level control circuit for processing an input audio signal into a first control-resultant audio signal, and a second automatic level control circuit for processing the input audio signal into a second control-resultant audio signal. The first automatic level control circuit has a first predetermined attack time and a first predetermined release time longer than the first predetermined attack time. The second automatic level control circuit has a second predetermined attack time and a second predetermined release time. The second predetermined attack time is longer than the first predetermined attack time. The second predetermined release time is substantially equal to the first predetermined release time. A subtracter operates for providing a difference signal representing a difference between the first control-resultant signal and the second control-resultant signal. An adder operates for adding the difference signal to the input audio signal.

REFERENCES:
patent: 5025700 (1991-06-01), Morikawa et al.
patent: 5473108 (1995-12-01), Matsuda et al.
patent: 6122381 (2000-09-01), Winterer
patent: 63-16712 (1988-02-01), None

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